Amphibian bicycle



FIG. 1 is a front elevation view of an amphibian bicycle showing my design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a rear elevation view thereof, showing the rear wheel in a tilted position and alternate position;

FIG. 8 is a rear perspective view thereof;

FIG. 9 is a front perspective view thereof. 

The ornamental design for an amphibian bicycle, as shown and described. 